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1 markWater and Waste Management

CSEC Human and Social Biology · January 2011 · Paper 2 · Question 9(b)(i)

Use of chlorine bleach in water treatment after a natural disaster.

Suggest the effect of chlorine bleach on drinking water.

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Other parts of this question

  1. 9(a)(i)What is meant by the term 'sterilization'?[1 mark]
  2. 9(a)(ii)Name TWO methods of sterilizing food or other materials.[2 marks]
  3. 9(b)(ii)Explain the function of chlorination in large-scale water purification.[2 marks]
  4. 9(c)(i)Explain how artificial passive immunity protects the individual.[2 marks]
  5. 9(c)(ii)Outline TWO differences between artificial passive immunity and artificial active immunity.[2 marks]

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